docs: def addConcept(self, conceptUri, weight, label = None, conceptType = None):
          """
          add a relevant concept to the topic page
          @param conceptUri: uri of the concept to be added
          @param weight: importance of the provided concept (typically in range 1 - 50)
          """
          assert isinstance(weight, (float, int)), "weight value has to be a positive or negative integer"
          concept = {"uri": conceptUri, "wgt": weight}
          if label != None: concept["label"] = label
          if conceptType != None: concept["type"] = conceptType
          self.topicPage["concepts"].append(concept)